Issue with multi-colored lines

[vico93]

I'm trying to make a multicolored line for Main Menu Credits using this generator, but i'm facing some difficulties with that.

The config i was able to figure out using that generator:

{
  "main_menu": {
    "top_left": [],
    "top_right": [],
    "bottom_left": ["",{"text":"Vicocraft","bold":true,"color":"gold"}," ","1.21-0.1b"," ",{"text":"BETA","bold":true,"underlined":true,"color":"red"}],
    "bottom_right": [],
    "mod_blacklist": []
  },
  "pause_menu": {
    "top_left": [],
    "top_right": [],
    "bottom_left": [],
    "bottom_right": [],
    "mod_blacklist": []
  }
}

According to that it should render everything in a single line:

...but in-game is rendering like that:

And yeah, as you can see, the mod seems to have working normally in 1.21-pre3, just FYI.